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The impact of hydrolyzing and oxidizing agents on chemical composition and digestibility of various high‐fibre forages
Author(s) -
Miccoli Florencia E.,
Arelovich Hugo M.,
Martínez Marcela F.,
Bravo Rodrigo D.,
Menghini Mariano
Publication year - 2018
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/gfs.12369
Subject(s) - straw , zoology , chemistry , sorghum , forage , composition (language) , urea , agronomy , biology , biochemistry , inorganic chemistry , linguistics , philosophy
Urea (U), sodium hypochlorite (H) and sodium chloride (S) alone or combined were applied upon high‐fibre forages ( HFF ) in three experiments. Experiment (Exp) I: tall wheatgrass ( TW ), weeping lovegrass ( WL ), deferred sorghum ( DS ) and barley straw ( BS ) as substrates were untreated (U0) or treated with 4 g 100 g −1 DM (U4), and stored for 45 days. Within each forage, CP and IVDMD were increased by U4 ( p < 0.01). Exp II : TW was treated with U and H: U (as in Exp I) and H (at 0, 0.25, 0.50, 0.75 and 1 g active Cl 100 g −1 DM), alone or combined. The interaction U*H was significant for ADF , ADL and CP . For U4+H0.25 ADF and ADL decreased ( p < 0.01). For U0, ADL was reduced from H.025 through H1.00 ( p < 0.05). U4 increased IVDMD and CP ( p < 0.01). Exp III : oat straw (O) was treated with U0 and U4, H0 and H1, S0 and S4 (4 g S 100 g −1 DM), including all combinations at 3 storage times (T = 10, 20 and 30 days). Interactions U*S*H*T for ADL , U*H*T for NDF and CP and S*H*T for IVDMD ( p < 0.05) were found. ADF was reduced by U4, H1 and S1 ( p < 0.01). The greatest decrease (4.5%) was with U4. Principal components analysis showed U4S4H1 highly related to IVDMD for all T. All treatments had little or no impact on NDF , ADF and ADL content. Lower quality forages had greatest improvements in digestibility and N‐retention.